#include "lib9.h"#include <a.out.h>#include <dynld.h> #define	CHK(i,ntab)	if((unsigned)(i)>=(ntab))return "bad relocation index" longdynmagic(void){	return DYN_MAGIC | I_MAGIC;} char*dynreloc(uchar *b, ulong p, int m, Dynsym **tab, int ntab){	int i;	ulong v, *pp; 	p += (ulong)b;	pp = (ulong*)p;	v = *pp;	switch(m){	case 0:		v += (ulong)b;		break;	case 1:		i = v>>22;		v &= 0x3fffff;		CHK(i, ntab);		v += tab[i]->addr;		break;	case 2:		i = v>>22;		CHK(i, ntab);		v = tab[i]->addr -p-4;		break;	default:		return "bad relocation mode";	}	*pp = v;	return nil;}